• #### 1.  Which of the following statements is true?

• Natural numbers are not associative for multiplication
• Whole numbers are not associative for multiplication
• Integers are associative for multiplication
• Rational numbers are not associative for multiplication.
• #### 2.  Which of the following statements is true?

• Natural numbers are associative for division
• Whole numbers are associative for division
• Integers are associative for division
• Rational numbers are not associative for division.
• #### 3.  0 is not

• a natural number
• a whole number
• an integer
• a rational number.
• #### 4.  $$\frac{1}{2}$$ is 2

• a natural number
• a whole number
• an integer
• a rational number.
• #### 5.  a + b = b + a is called

• none of these.
• #### 6.  a × b = b × a is called

• commutative law for multiplication
• associative law for multiplication.
• #### 7.  (a + b) + c = a + (b + c) is called

• commutative law for multiplication
• associative law for multiplication.
• #### 8.  a × (b × c) = (a × b) × c is called

• associative law for multiplication
• commutative law for multiplication.
• #### 9.  a(b + c) = ab + ac is called

• commutative law
• associative law
• distributive law
• none of these.
• #### 10.  The additive identity for rational numbers is

• 1
• -1
• 0
• none of these.
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